Drop-door oven



Dec. 16, 1930. E. A. CHANDLER ET AL DROP DOOR OVEN Filed Aug. 31, 1929IIIIIIIIIIIIII It i I I I I I I I I I I I zlwuwntoz W n a n. w w A WI Qv m a M A; z a a z a m w a M (U I. .l @l

IIII! \IIIIIIIIIIIIIIIII Patented Dec. 16, 1930 UNITED STATES PATENTOFFICE ERNEST A. CHANDLER AND JOHN H. MCSANN, OF NASHVILLE, TENNESSEE,ASSIGNORS OF ONE-THIRD TO ISAAC'S. WAMPLER, OF NASHVILLE, TENNESSEEDROP-DOOR OVEN Application filed August 31, 1929. Serial No. 389,852.

This invention relates to a stove or range oven of that type havingmovable pan-supporting racks or shelves, and more particularly tooperating means for the racks or shelves.

The invention has for one of its objects to provide novel, simple andinexpensive means of the character stated which shall be adapted to movean oven rack or shelf outavardly as the door of the oven is opened andto move the rack or shelf inwardly as the door is closed, whereby topermit a pan to be placed within and removed from the oven easily anduickly and without danger of burning the ands.

The invention has for a further object to providemeansof the characterstated which shall be adapted to effect the inward and outward movementof the rack or shelf in a straight path and in a manner to prevent itscontacting withthe door, whereby to permit the opening and closing ofthe door and the consequent inward and outward movement of the rack orshelf with but comparatively little efiort.

The invention has for a further object to provide means, through themedium of which one or more anxiliaryracks or shelves may be supportedfrom the main or that rack or shelf connected to the door.

The invention has for a still further ob- ;ject to provide auxiliaryrack or shelf suptudinally through a'stove or range oven equipped withracks or shelves and rack or shelfoperating means constructed inaccordance with our invention, the door of the oven being shown inclosedposition and the racks I or shelves in their normal position;

Figure 2 is a sectional view taken on a vertical plane extendingcentrally and longi tudinally through the oven with the door in openedposition and with the maiirrack or shelf in outward position, theauxiliary'racks or shelves and the supporting means there- Figures 5 and6 are elevational views i llustrating the manner in which the auxiliary.

rack or shelf supporting means are detachably engaged with the main rackor shelf.

Referring in detail to, the drawing, 1 designates the bottom, 2 the top,3 the sides, 4 the back, and 5 the door of a stove or range oven 1 ofthe usual construction. The door 5', which is of the drop type, ishinged at its lower a edge, as at 6, to the bottom 1, and it 'isprovided adjacent its upper edge with a handle 7.

In accordance with our invention, the oven is provided with a pair ofguides 8 which are secured to the sides 3 of the oven, and are grooved,as at 9, for the slidable reception of" the side edges or a rack orshelf10, ,The guides 8 are detachably secured tothe sides 3 through themedium of rear pins '11- and front pins 12 secured to the sides,rearwardlyj I '85,

facing rear hooks 13 secured to the guides and engaging the pins 11, andslotted front-lugs 14 extending downwardly from "the guides and engagingthe pins 12. The means for securing the guides 8 in place also comprisesears 15 extending upwardly from the cen. ters of the guides, and withset screws 16 carried by of the oven.

The securing means therefor permits the guides 8 to be easily andquickly placed with-' in or removed from the oven. To apply the,- guides8, it is only necessary to first engage the hooks 13 with the pins 11,and this may be done readily by holding the. guides in a downwardly andrearwardly inclined posithe ears and engaging the sides 3 tion. Afterthe hooks 13 have been engaged with the pins 11, the guides 8 are swungdownwardly on the pins to enga e the lugs 14 with the pins 12, andtherea ter the set screws 16 are turned into engagement with the sides 3of the oven. To remove the ides 8, it is only necessary to withdraw t eset screws 16 from engagement with the sides 3 of the oven, rock theguides upwardly on the pins 11, so as to withdraw the lugs 14 fromengagement with the pins 12, and thereafter disengage the hooks fromtheir pins,

The rack or shelf 10, which may be of any well known or appropriateconstruction, con- .stitutes the main rack or shelf of the oven, andthis rack or shelf is connected to the door 5 of the oven by means-whichcause it to move outwardly as the door is opened and to move inwardly asthe door is closed. This means comprise arms 17 which are secured, as

. at 18, to the door 5 at points above its lower hinged edge andadjacentits lateral or side edges. The arms 17 extend downwardly, andrearwardly from the door 5, and their lower .or rear ends are pivotallyconnected, as at 19,

to the front ends of links 20. The links 20 are located directly abovethe guides 8, and are provided with enlarged rear end portions 20a whichrest upon the guides.

The link portions 20aare provided with longitudinally extending andsubstantially horizontal slots 21 which are provided at their rear endswith upwardly extending branches 21a. ;Lugs 22 extend upwardly from thesides of the main rack or shelf 10 inwardly of the guides 8 and links20, and are provided at their upper ends with pins 23 which pass throughthe slots 21 of the links. Auxiliar racks or shelves 24 and 25, whichmay also e of any well known or appropriate construction, are arrangedabove the main rack ,or shelf 10 and supported upon the main rack orshelf for inward and out- .ward movement therewith. The means formounting the auxiliary racks or shelves 24- and 25 upon the main rack orshelf 10 comor shelf 10 to effect a connection between the bracket andmain rack'or shelf. The bracket may be readily connected to. the mainrack or shelf 10 by holding it in a downwardly and rearwardly inclinedposition while engagin its notches 29 with the rearward bars 10a 0 therack or shelf, and by them swinging the rack or shelf downwardly on suchbar toengage its notches 30 with the forward bar 10a of the rack orshelf.

The combined weights of the bracket and the auxiliaryracks or shelves 24and 25 will hold the bracket against accidental tilting movement on themain rack or shelf 10. When it is desired to remove the bracket from themain rack or shelf 10, its front end.

is swung upwardly to disengage the notches 30 from thefront rod 10av andit is then moved forwardly to disengage the notches 29 from the rear rod10a.

When the door 5 is closed, the main rack or shelf 10 and the auxiliaryracks or shelves 24 and 25 occupy their normal position within the ovenwith their front ends spaced from the door, the rear ends of the links20 rest upon cam lugs 31 extendmg upwardly from the upper sides of theides 8, and the pins 23 are arranged in the i' ont ends of the slots 21of the links. As the pins 23 are arranged in the front ends of the slots21, the first phase of the opening movement of the door 5 W111 notimpart any movement to the racks or shelves 10, 24 and 25. During thisphase of the opening movement of'the door 5, the lmks 20 are movedforwardly with respect to the pins 23, and on the completion of thisphase of the opening movement of the door, I

the pins 23 will be in contact with the rear end walls of the slots,with the result that during the neit and larger phase of the opening'movement of the door the racks or'shelves 10, 24, and 25 will be movedoutwardly.

After the links 20 pass the cam lugs 31, they move downwardly, with theresult that the pins 23 will be carried into the upwardly extendingbranches 21a of the slots 21. Such a connection is now establishedbetween the links 20 and the pins 23 that the racks or shelves 10, 24and 25 will be moved inwardly during the first phase of the closingmovement of the door 5. During the latter part of this phase of theclosing movement of the door 5, and immediately after the racks orshelves 10, 24 and 25 have been returned to their normal position withinthe oven, the

rear ends of the links 20 will be moved upwardly by the cam lugs 31, andupon the completion of this phase of the closing movement ofthe door,said ends of the linksvwill rest upon the cam lugs. During-the upwardmovement ofthe rear ends of the links 20 by the cam lugs 31, theupstanding branches 21a of the slots 21 are moved out of. engagementwith the pins 23. The pins 723 are'now in the rear ends of the slots 21,with theresult that the door 5 will move through its final and smallerclosing phase withoutimparting any movement to the racks or shelves 10,24

and 25. To permitthe front end portion-of the main rack or shelf 10 tooccupy alposition means between the arms 17 when the door 5 is in as at10?).

It should be understood from the foregoing description, taken inconnection with theaccompanying drawing, that the racks or shelves 10,24 and 25 are supported by their guides 8 and 28 for movement instraight paths, that there is no possibility of the racks or shelvescontacting with the door 5 during the opening or closing of thelatter,and that the auxiliary rack or shelf supporting bracket may .be easilyand quickly applied to and remove from the main rack or shelf and firmlyconnects and substantially supports the auxiliary racks or shelves fromthe main rack or shelf. i

While we have described the principle of the invention together with thestructure which we now consider the preferred embodiment thereof, it isto be understood that the structure shown is merely illustrative andthatsuch changes may be made, when desired, as fall within the scope of theinvention as claimed.

We claim':-

L In combination, an oven provided with a hinged door, guides securedwithin the oven, means for detachably securing said guides in said oven,a rack slidably supportsignatures.

longitudinally extending slot having an up standing rear end extension,a bracket extending upwardl from the rack, a pin carried by the bracketand extending throu h the slot of the link, and a cam carried y saidguide and adapted to permit the rear end of the link to move downwardlyduring the first phase of the opening movement of the door and adaptedto elevate said end of the link during the final phase of the closingmovement of the door.

4:. In combination, an oven provided with a hinged door, guides securedwithin the oven, a main rack slidably supported by the guides, meansconnecting the rack to the door to permit the rack to be moved outwardlyduring the opening of the doorand to be moved inwardly during theclosing of the door, rearupright' bars provided with rearwardly openingnotches engaged with the rack, front upright bars provided withdownwardly opening notches engaged with the rack, guides secured to thebars, -and an auxiliary rack slidably mounted in the guides.

' In'testimony whereof we hereunto afi'ix our ERNEST A. CHANDLER. JOHNH. MoGANN.

ed by the guides, an arm secured to the inner side of the door, a linkpivotally connected to the arm and resting upon one of the guides, andmeans connecting the link to the rack to permit the door to move therack outwardly during the final phase of its opening -movement and topermit the door to move the rack inwardly during the first phase of itsclosing movement.

2. In combination, an oven provided with a hinged door, guides securedwithin the oven, a rack slidably supported by the guides, an arm securedto the inner side of the door, a link pivotally connected to the arm andresting upon one of the guides, the link being provided at its inner endwith a longitudinally extending slot having an upstanding rear andextension, a bracket extending upwardly fromthe rack, a pin carried bythe bracket and extending through the slot of the link, and meansadapted to permit the rear end'of the link to move downwardly during thefirst phase of the opening movement of the door and adapted to elevatesaid end of the link during the final phase of the closing movement ofthe I door.

3. In combination, an oven provided with ahinged door, guides securedwithin the oven, a rack slldably supported b the guides, an arm securedto the inner side of the door, alink pivotally connected to the arm andresting upon one of the guides, the link being provided at its inner endwith a

